Pipe wrench



April 26 1927.

F. COX

PIPE WRENCH v Filed July 12. 1926 Erma Patented Apr. 26, 1927.

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rrrn WRENCH.

Application filed. July 12,

is of extreme simplicity and hence may beinexpensively manufactured and sold at small cost, the construction however being such that the device will be exceptionally efiicient.

With the foregoing in view, the invent on resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing.

Figure 1 is a side elevation of the wrench.

Figure 2 is a side elevation with parts broken away and in section.

Figure 3 is an edge view.

Figure 4 is a transverse section on line 4-4 of Fig. 1. e

In the drawing above briefly described, the numeral 5 designates a handle having two forwardly projecting arms 6 and 7 at its front end, said arms having straight, forwardly diverging inner edges 6 and 7 respectively. Preferably, the handle 5 and its arms 6 and 7 are formed from a single piece of flat steel, as shown.

Two elongated jaws 8 and 8 which are duplicates with the exception of the direction taken by their teeth 9, contact with the straight edges 6 and 7", and each of these jaws is provided with a pair of parallel side flanges 10 which contact with the opposite flat sides of the arms 6 and 7. The flanges 10 of the jaw S a're secured to the arm 7 by rivets or bolts 11 passing through said flanges and arm. The jaw 8 however is slidably connected with the jaw 6. To establish this sliding connection, I form the arm 6 with a pair of elongated slots 12 which are parallel with the straight edge 6 of said arm, and I pass bolt-s or other fasteners 11 through the flanges 10 of said jaw 8 and through said slots 12. A coiled compression spring 13 is confined in one of these slots and engages the rear end wall of the latter and the slot-received fastener 11*,

so that said spring normally moves the jaw 1926. Serial No. 121,989.

iszaase set @ELOYD cox, .or snna nan, w oMiNe, AssIGNoR-or ONE-FIFTH SWAN, or SHERIDAN, WYOMING.

8forwardly to the limit permitted by the slots and fasteners. By so confining the sprmg 13 in one of the slots 12, allowing said spring to force against the adjacent fastener 11 and to react against the rear end of said slot, I utilize this slot and the fastener received therein, not only as part of the'means for holding the jaw 8. in

proper place upon the arm 6, but I utilize the slot to contain the spring and make further use of the fastener as means for transferring the thrust of said spring to the jaw.. Hence, an exceptionally simple and inexpensive construction is produced, yet one which will be desirable and efficient.

Preferably, the rear end portion of, the arm 7 is provided with a shoulder 14. which abuts the rear end of the jaw 8 and the arm 6 is by preference provided with a similar shoulder 14 to limit the rearward sliding of the jaw 8.

Whenthe wrench is applied tothe work a and turned in the proper direction, the teeth 9 ofthe two jaws grip such work and as the wrench is further turned, the jaw 8 slides inwardly to the limit permitted by the shoulder 14:. This inward sliding greatly increases the gripping action of the jaws upon the work, as is customary with wrenches of the closed.

Excellent results have been obtained from the exact details herein disclosed and they are therefore preferably followed. However, within the scope of the invention as claimed, variations may be made. i

I claim I 1. An open end wrench comprising a handle provided at its front end with two flat forwardly projecting arms having straight forwardly diverging inner edges, one of said arms having a slot parallel with said inner edge thereof, two substantially duplicate toothed jaws contacting with said inner edges of said arms and each having general type herein disparallel side flangescontacting with oppo-,

site sides of said arms, a fastener passing through the side flanges of one jaw and through the slot of said one arm to slidably connect said one arm and jaw, another fastener passing through the side flanges of the other jaw and through the intervening arm to secure them together, and a coiled compression .spring confined in said slot by the flanges of said one aw, said spring enher havin a strai ht ed 'e said member being formed with a slot parallel with said edge, a toothed jaw slidably contaoting with said straight edge, said having parallel side flanges contacting slidably with opposite sides-0f said jaw-carrying member and closing the opposite sides. of said slot, a fastener passing through said flanges and .said slot, and a coiled compression spring confined in said slot, said spring engaging said fastener and one end of the slot toinormally move the j aw to one extreme position;

In testimony whereof I have hereunto affixed my signature.

FLOYD" oox 

